http://www.rr-fallenflags.org/dh/dh.html

Scroll down about 60% of the way, look for the C(larence) Tharp photos of
"Frt Cars" to see some interesting photos of Freight car parts thanks to
scrapping.

Also see:
http://www.rr-fallenflags.org/dh/dh-wrk-hkk.jpg
for a good look at the underside of a modern-ish freight car. Post 1960,
sorry, but steam era cars were a lot like this too . . .

SGL